Maybe you're a jeweler at a local jewelry store and need to measure a loose gemstone. Or perhaps you're looking at making jewelry and need to fit a gemstone to a certain ring or necklace. There are many instances where you may find yourself needing to know how to measure a gemstone, either by weight or size. There are a numebr of techniques to help you properly measure a gemstone either for jewelry use, appraisal or personal knowledge.
Things You'll Need
- Leveridge guage
- Stone guage / hole guage
- Highly senstivie gemstone scale
Measure the diameter of a gemstone by using a caliper, either a manual one or a high quality, electronic calibrated one. This will tell you the diameter of a the gemstone, which is essential if using the gemstone in a jewelry setting or for a specific use.
Determine the carat weight of a gem. This is one way to measure a gemstone to determine its worth, and can be done with a special, highly sensitive gemstone scale. A carat weighs .2 grams (or in U.S. measurements, .007 ounces), so it is important to have a special gem scale in order to properly determine the carat measurements of a gemstone.
Estimate the size of a given gemstone by using a stone gauge or hole gauge. These are rulers or templates with varying sizes of holes in which you can pass a gemstone through to estimate its approximate diameter and size. This does not, however, help you determine the carat weight of a gemstone, but can be helpful for a jeweler that is trying to fit a gemstone for a particular setting.
Invest in a Leveridge gauge, which can help you measure gemstones with extreme accuracy. Leveridge gauges appear like a scale that you would see at a supermarket for produce, but have a caliper on the top, so you can not only measure length and width, but weight as well. This can be used for measuring gemstones in or out of a jewelry setting.
- Wire Sculpture: How to Measure Gemstones for Settings
- Asia-Gems: Estimating Carat Weights of Gemstones From Measurements
- BWSMigel.info: Naming Gems and Measuring Gems
- Jewelry Design Gemsontes: Carats are not the only measure of a gemstone
- Today Gem: Gemstones Diamonds Cut and Shape of Gems
- Gem Select: What is the scale used to measure the hardness of gemstones?
- Photo Credit garnet gemstones image by Julianna Olah from Fotolia.com
How to Measure a Waist
Knowing your exact waist measurement can be very helpful in determining your clothing size, and it is a good indicator of your...
How to Calculate Ring Size
Accurately measuring your finger for its ring size is pretty simple. There is a standard North American conversion scale, and the same...
How to Design Body Jewelry Plugs
Body modification is a growing art form across the United States and abroad. With stretched ear piercings becoming less taboo, finding designer...
How to Measure Carat Weight of a Diamond
Carat weight is simply the gross physical weight of a gemstone, with one carat equaling 200 milligrams, or approximately 1/142 of an...
How to Determine Loose Gemstone Size to Fit a Ring Setting
Loose gemstones offer customers the ability to design their own unique and beautiful ring. By choosing the cut and color for the...
How to Measure Round Diamonds
Carat weight is the primary form of measuring a diamond, but it is not the only one or the only one that...